Trisaptono Trisaptono’s scientific contributions

and low body mass index. 2) differences in the effect of the circuit training method and interval training on increasing the VO2 Max Ability of Volleyball Players. 3) the difference in the VO2 Max ability of Volleyball Players between the circuit training method for high body mass index and the interval training method for high body mass index. 4) the difference in the VO2 Max Ability of Volleyball Players between the low body mass index circuit training method and the low body mass index training interval training method. 5) the effect of the interaction between body mass index and training methods on increasing the VO2 Max Ability of Volleyball Players. This study used a 2x2 factorial design experimental method. Population of Volleyball Club players Balangan Student Association, Sleman Yogyakarta. Total sample was 24 athletes. Data analysis techniques using ANAVA. The results: 1) There is a difference in effect between the circuit training method with a mean of 2.716666667, interval training with a mean of 3.655833333, on the increase in the VO2 Max ability of the mean difference of 0.939166666. 2) There is a difference in the effect between low body mass index with a mean of 3.844166667, high body mass index with a mean of 2.528333333 on the increase in the ability of VO2 max selisish by a mean of 1.315833334. 3) There is a difference in the effect of circuit training on average low Body Mass Index 3.001666667, interval training for low Body Mass Index with a mean of 4.686666667 on the increase in VO2 Max ability, a mean difference of 1.685. 4) there is a difference in the effect of circuit training on high Body Mass Index with a mean of 2.431666667, interval training for Body Mass Index with a mean height of 2.626 on the increase in VO2 max, a mean difference of 0.193333333 5) Interaction between Body Mass Index and exercise methods 1.45530676.